Very cool. I do wonder if it means a guaranteed wipeout of the gut microbiome though. Granted, this is likely to be a last line of defense, but _C. diff_ is nothing to mess with either. Sure, we'll be able to kill that with this too, even the nasty vancomycin-resistant strain, but too long with an empty gut isn't good for us either. We'll probably need to get better at microbiome engineering and probiotic used to compensate.